QueryFilter

Last updated on May 30, 2024 | Also applies to ColdFusion

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CFML Reference

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CFML Reference User Guide
ColdFusion functions
ColdFusion tags
1. ColdFusion tag summary
2. ColdFusion tags by category
  1. Application framework tags
    1. cfapplication
    2. cfassociate
    3. cferror
    4. cfimport
    5. cfinterface
    6. cflock
    7. cfscript
    8. cfthread
  2. Communications tags
  3. Database manipulation tags
  4. Data output tags
    1. cfchart
  5. Debugging tags
    1. cfdump
    2. cftimer
    3. cftrace
  6. Exception handling tags
    1. cfcatch
    2. cferror
    3. cffinally
    4. cfrethrow
    5. cfthrow
    6. cftry
  7. Extensibility tags
    1. cfchart
    2. cfchartdata
    3. cfchartseries
    4. cfcollection
    5. cfcomponent
    6. cfexecute
    7. cfftp
    8. function
    9. cfindex
    10. cfinterface
    11. cfinvoke
    12. cfinvokeargument
    13. cfobject
    14. cfproperty
    15. cfreport
    16. cfreportparam
    17. cfreturn
    18. cfsearch
    19. cfsharepoint
    20. cfspreadsheet
    21. cfwddx
    22. cfxml
  8. File management tags
    1. cfdirectory
    2. cffile
    3. cffileupload
    4. cfftp
    5. cfzip
    6. cfzipparam
  9. Flow-control tags
    1. cfabort
    2. cfbreak
    3. cfcase
    4. cfcontinue
    5. cfdefaultcase
    6. cfelse
    7. cfelseif
    8. cfexecute
    9. cfexit
    10. cfif
    11. cfinclude
    12. cflocation
    13. cfloop
    14. cfrethrow
    15. cfswitch
    16. cfthrow
    17. cftry
  10. Forms tags
    1. cfapplet
    2. cfcalendar
    3. cffileupload
    4. cfform
    5. cfformgroup
    6. cfformitem
    7. cfgrid
    8. cfgridcolumn
    9. cfgridrow
    10. cfgridupdate
    11. cfinput
    12. cfpdf
    13. cfpdfform
    14. cfpdfformparam
    15. cfpdfparam
    16. cfpdfsubform
    17. cfselect
    18. cfslider
    19. cftextarea
    20. cftree
    21. cftreeitem
  11. Internet Protocol tags
    1. cfajaximport
    2. cfajaxproxy
    3. cfftp
    4. cffeed
    5. cfimap
    6. cfhttp
    7. cfhttpparam
    8. cfldap
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    12. cfpop
    13. cfsprydataset
  12. Page processing tags
    1. cfcache
    2. cfcontent
    3. cfflush
    4. cfheader
    5. cfhtmlhead
    6. cfinclude
    7. cfprocessingdirective
    8. cfsetting
    9. cfsilent
  13. Security tags
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    1. cfcookie
    2. cfdump
    3. cfparam
    4. cfregistry
    5. cfsavecontent
    6. cfschedule
    7. cfset
    8. cfsetting
  15. Other tags
    1. cfimage
    2. cflog
    3. cfregistry
3. Tags a-b
4. Tags c
5. Tags f
6. Tags g-h
  1. cfgraph
  2. cfgraphdata
  3. cfgrid
  4. cfgridcolumn
  5. cfgridrow
  6. cfgridupdate
  7. cfheader
  8. cfhtmlhead
  9. cfhtmltopdf
  10. cfhtmltopdfitem
  11. cfhttp
  12. cfhttpparam
7. Tags i
  1. cfif
  2. cfimage
  3. cfimap
  4. cfimapfilter
  5. cfimpersonate
  6. cfimport
  7. cfinclude
  8. cfindex
  9. cfinput
  10. cfinsert
  11. cfinterface
  12. cfinvoke
  13. cfinvokeargument
8. Tags j-l
9. Tags m-o
10. Tags p-q
  1. cfparam
  2. cfpdf
  3. cfpdfform
  4. cfpdfformparam
  5. cfpdfparam
  6. cfpdfsubform
  7. cfpod
  8. cfpop
  9. cfpresentation
  10. cfpresentationslide
  11. cfpresenter
  12. cfprint
  13. cfprocessingdirective
  14. cfprocparam
  15. cfprocresult
  16. cfprogressbar
  17. cfproperty
  18. cfquery
  19. cfqueryparam
11. Tags r-s
  1. cfregistry
  2. cfreport
  3. cfreportparam
  4. cfrethrow
  5. cfreturn
  6. cfsavecontent
  7. cfschedule
  8. cfscript
  9. cfsearch
  10. cfselect
  11. cfservlet
  12. cfservletparam
  13. cfset
  14. cfsetting
  15. cfsharepoint
  16. cfsilent
  17. cfslider
  18. cfspreadsheet
  19. cfsprydataset
  20. cfstoredproc
  21. cfswitch
12. Tags t
  1. cftable
  2. cftextarea
  3. cftextinput
  4. cfthread
  5. cfthrow
  6. cftimer
  7. cftooltip
  8. cftrace
  9. cftransaction
  10. cftree
  11. cftreeitem
  12. cftry
13. Tags u-z
  1. cfupdate
  2. cfwddx
  3. cfwebsocket
  4. cfwindow
  5. cfxml
  6. cfzip
  7. cfzipparam
CFML Reference
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Cloud services

Note:

You can also set the maximum thread count in ColdFusion Administrator. Click Server Settings > Settings and specify the number of threads in Default Maximum Thread Count For Parallel Functions.

Description

Calls the provided function for each row of the provided query and removes the row from query if the function returns false.

Returns

Filtered query.

Category

Query functions

History

ColdFusion (2021 release): Introduced the following parameters:

parallel
maxThreadCount

Also, in this release, QueryFilter will not mutate the original query. To maintain backward compatibility, there is a JVM flag coldfusion.query.filter.mutateinputquery.

Adobe ColdFusion (2018 release): Introduced named parameters.

Adobe ColdFusion (2016 release): Added the function.

See also

QueryEach, QuerySort, QueryKeyExists

Syntax

queryFilter(query, function(row [, currentRow] [, query] ){} [, parallel] [, maxThreadCount])

queryFilter(query, function(row [, currentRow] [, query] ){} [, parallel] [, maxThreadCount])

Parameters

Parameter	Description
query	(Required) Query to be iterated over.
filter	(Required) Function to be called with each row of the query. Should return a boolean value.
parallel	(Optional) True if you want to enable parallel programming.
maxThreadCount	(Optional) The number of threads the function can execute. The number of threads must be between 1-50. If the value exceeds 50, there is an exception.

Example 1

myQuery = queryNew("id,name,amount","Integer,Varchar,Integer",

[

{id=1,name="One",amount=15},

{id=2,name="Two",amount=18},

{id=3,name="Three",amount=32},

{id=4,name="Four",amount=27},

{id=5,name="Five",amount=43},

{id=6,name="Six",amount=71}

]);

filteredQuery=QueryFilter(myQuery,function(obj){

return obj.amount>=30

})

writeOutput("The filtered query is:")

writeDump(filteredQuery)

</cfscript>

<cfscript> myQuery = queryNew("id,name,amount","Integer,Varchar,Integer", [ {id=1,name="One",amount=15}, {id=2,name="Two",amount=18}, {id=3,name="Three",amount=32}, {id=4,name="Four",amount=27}, {id=5,name="Five",amount=43}, {id=6,name="Six",amount=71} ]); filteredQuery=QueryFilter(myQuery,function(obj){ return obj.amount>=30 }) writeOutput("The filtered query is:") writeDump(filteredQuery) </cfscript>

<cfscript>
    myQuery = queryNew("id,name,amount","Integer,Varchar,Integer", 
                [ 
                        {id=1,name="One",amount=15}, 
                        {id=2,name="Two",amount=18}, 
                        {id=3,name="Three",amount=32},
                        {id=4,name="Four",amount=27},
                        {id=5,name="Five",amount=43},
                        {id=6,name="Six",amount=71}
                ]);
    filteredQuery=QueryFilter(myQuery,function(obj){
       return obj.amount>=30
    })
    writeOutput("The filtered query is:")
    writeDump(filteredQuery)
</cfscript>

Example 2

qoptions = {result="myresult", datasource="cfbookclub", fetchclientinfo="yes"};

sampleQuery = QueryExecute("select * from books order by bookid", [] ,qoptions);

function filterQuery(any Obj){

return (Obj.ISSPOTLIGHT == "Y" ? true : false);

}

WriteDump(QueryFilter(sampleQuery, filterQuery));

</cfscript>

<cfscript>
               qoptions = {result="myresult", datasource="cfbookclub", fetchclientinfo="yes"};
               sampleQuery = QueryExecute("select * from books order by bookid", [] ,qoptions);
               
               function filterQuery(any Obj){
                              return (Obj.ISSPOTLIGHT == "Y" ? true : false);
               }

               WriteDump(QueryFilter(sampleQuery, filterQuery));
</cfscript>

The script filters the query result to display objects, where IsSpotlight is “Y”. The script returns an array of structs.

Using member function

myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"});

// Execute the function to call each row and return the values of Location

status=myResult.filter(function (city){

return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false);

});

// Display the values that meet the filter requirements

WriteDump(status);

</cfscript>

<cfscript> myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"}); // Execute the function to call each row and return the values of Location status=myResult.filter(function (city){ return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false); }); // Display the values that meet the filter requirements WriteDump(status); </cfscript>

<cfscript>
       myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"});
       // Execute the function to call each row and return the values of Location
       status=myResult.filter(function (city){
             return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false);
                    
       });
       // Display the values that meet the filter requirements
       WriteDump(status);
</cfscript>

Using parallelization

myQuery = queryNew("id,name,amount","Integer,Varchar,Integer",

[

{id=1,name="One",amount=15},

{id=2,name="Two",amount=18},

{id=3,name="Three",amount=32},

{id=4,name="Four",amount=27},

{id=5,name="Five",amount=43},

{id=6,name="Six",amount=71}

]);

QueryFilter(myQuery,function(obj){

return obj.amount>=30

},true,5)

writeOutput("The filtered query is:")

//writeDump(filteredQuery)

writeDump(myQuery)

</cfscript>

<cfscript> myQuery = queryNew("id,name,amount","Integer,Varchar,Integer", [ {id=1,name="One",amount=15}, {id=2,name="Two",amount=18}, {id=3,name="Three",amount=32}, {id=4,name="Four",amount=27}, {id=5,name="Five",amount=43}, {id=6,name="Six",amount=71} ]); QueryFilter(myQuery,function(obj){ return obj.amount>=30 },true,5) writeOutput("The filtered query is:") //writeDump(filteredQuery) writeDump(myQuery) </cfscript>

<cfscript> 
    myQuery = queryNew("id,name,amount","Integer,Varchar,Integer",  
                [  
                        {id=1,name="One",amount=15},  
                        {id=2,name="Two",amount=18},  
                        {id=3,name="Three",amount=32}, 
                        {id=4,name="Four",amount=27}, 
                        {id=5,name="Five",amount=43}, 
                        {id=6,name="Six",amount=71} 
                ]); 
    QueryFilter(myQuery,function(obj){ 
       return obj.amount>=30 
    },true,5) 
    writeOutput("The filtered query is:") 
    //writeDump(filteredQuery) 
 writeDump(myQuery) 
</cfscript>

Using parallelization- Example 2

qoptions = {result="myresult", datasource="cfbookclub", fetchclientinfo="yes"};

sampleQuery = QueryExecute("select * from books order by bookid", [] ,qoptions);

writeDump(sampleQuery)

function filterQuery(any Obj){

return (Obj.ISSPOTLIGHT == "Y" ? true : false);

}

WriteDump(QueryFilter(query=sampleQuery,callback=filterQuery,parallel=true,maxthreadcount=10);

writeDump(sampleQuery);

WriteDump(QueryFilter(query=sampleQuery, callback=filterQuery,parallel=false));

writeDump(sampleQuery);

</cfscript>

<cfscript> qoptions = {result="myresult", datasource="cfbookclub", fetchclientinfo="yes"}; sampleQuery = QueryExecute("select * from books order by bookid", [] ,qoptions); writeDump(sampleQuery) function filterQuery(any Obj){ return (Obj.ISSPOTLIGHT == "Y" ? true : false); } WriteDump(QueryFilter(query=sampleQuery,callback=filterQuery,parallel=true,maxthreadcount=10); writeDump(sampleQuery); WriteDump(QueryFilter(query=sampleQuery, callback=filterQuery,parallel=false)); writeDump(sampleQuery); </cfscript>

<cfscript> 
               qoptions = {result="myresult", datasource="cfbookclub", fetchclientinfo="yes"}; 
               sampleQuery = QueryExecute("select * from books order by bookid", [] ,qoptions); 
                writeDump(sampleQuery) 
               function filterQuery(any Obj){ 
                              return (Obj.ISSPOTLIGHT == "Y" ? true : false); 
               } 
  
      WriteDump(QueryFilter(query=sampleQuery,callback=filterQuery,parallel=true,maxthreadcount=10); 
      writeDump(sampleQuery); 
   WriteDump(QueryFilter(query=sampleQuery, callback=filterQuery,parallel=false)); 
   writeDump(sampleQuery); 
</cfscript>

Using parallelization- Example 3

myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"});

// Execute the function to call each row and return the values of Location

status=myResult.filter(function (city){

return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false);

},true,10);

// Display the values that meet the filter requirements

WriteDump(status);

writeDump(myResult)

</cfscript>

<cfscript> myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"}); // Execute the function to call each row and return the values of Location status=myResult.filter(function (city){ return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false); },true,10); // Display the values that meet the filter requirements WriteDump(status); writeDump(myResult) </cfscript>

<cfscript> 
       myResult=QueryExecute("SELECT * FROM EMPLOYEES",[],{datasource="cfdocexamples"}); 
       // Execute the function to call each row and return the values of Location 
       status=myResult.filter(function (city){ 
             return (city.LOCATION=="Newton" || city.LOCATION=="San Francisco" ? true : false); 
                      
       },true,10); 
       // Display the values that meet the filter requirements 
       WriteDump(status); 
    writeDump(myResult) 
</cfscript>

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QueryFilter

Description

Returns

Syntax

Parameters

Example 1

Example 2

Using member function

Using parallelization

Using parallelization- Example 2

Using parallelization- Example 3

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